Security Corner

Aug 23 2008   2:39AM GMT

Oscarbot.UG Eludes Detection with Intelligent Stealth

Ken Harthun Ken Harthun Profile: Ken Harthun

According to Panda Security, the Oscarbot.UG virus, first detected on August 17, 2008, uses intelligent stealth techniques to avoid detection.  “It deletes the original file from which it was run once it is installed on the computer. It uses several methods in order to avoid detection by antivirus companies [one of them being that it] terminates its own execution if it detects that it is being executed in a virtual machine environment, such as VMWare or VirtualPC.”

As reported by Help Net Security, the worm “stops running if it finds that it is being tried on virtual machines such as vmware, a sandbox or in a honeypot (these tools are often used to check in a controlled environment if an executable file is running malicious commands).

The good news is that anyone running a virtual environment is safe from infection: The worm won’t run and when you shut down the virtual machine, it’s gone. The bad news is that malware using this type of intelligent stealth is on the rise, raising the bar for anti-malware researchers.

At what point do we switch from a reactive anti-malware approach (blacklisting) to a pro-active one (whitelisting)? The day is fast approaching (it may already be here) when the programs designed to protect us become so huge and so invasive that they prevent us from getting any useful work done.

The best way to combat malware would be to take the profit out of spam, phishing scams, and other cyber-fraud crimes.

I don’t have the answer for that one.

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